No exploitation reportedFix available

CVE-2019-6528

Q: Is CVE-2019-6528 actively exploited?

Active exploitation of CVE-2019-6528 has not been confirmed. Its EPSS score was 2.6% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2019-6528?

CVE-2019-6528 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

No exploitation reported by the sources we read.

Published2019-03-05
Fixed in6.0.16 · 5.1.20
WeaknessCWE-79

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

PSI GridConnect GmbH Telecontrol Gateway and Smart Telecontrol Unit family, IEC104 Security Proxy versions Telecontrol Gateway 3G Versions 4.2.21, 5.0.27, 5.1.19, 6.0.16 and prior, and Telecontrol Gateway XS-MU Versions 4.2.21, 5.0.27, 5.1.19, 6.0.16 and prior, and Telecontrol Gateway VM Versions 4.2.21, 5.0.27, 5.1.19, 6.0.16 and prior, and Smart Telecontrol Unit TCG Versions 5.0.27, 5.1.19, 6.0.16 and prior, and IEC104 Security Proxy Version 2.2.10 and prior The web application browser interprets input as active HTML, JavaScript, or VBScript, which could allow an attacker to execute arbitrary code.

Timeline

dates in UTC

2019-03-0520:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2019-6528?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2019-6528?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Psigridconnect smart telecontrol unit tcg firmwareversion to verify

Branch	Affected	Fixed in	Source
6.0	≥ 5.1.21, < 6.0.16	6.0.16	NVD
5.1	< 5.1.20	5.1.20	NVD

Psigridconnect telecontrol gateway 3g firmwareversion to verify

Branch	Affected	Fixed in	Source
6.0	≥ 5.1.21, < 6.0.16	6.0.16	NVD
5.1	< 5.1.20	5.1.20	NVD

Psigridconnect telecontrol gateway vm firmwareversion to verify

Branch	Affected	Fixed in	Source
5.1	< 5.1.20	5.1.20	NVD
6.0	≥ 5.1.21, ≤ 6.0.16	no fix published	NVD

2 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-19-059-01 CISA5 known affected
PSI GridConnect Telecontrol
Smart Telecontrol Unit TCG: Versions 5.0.27 5.1.19 6.0.16 and prior; · IEC104 Security Proxy: Version 2.2.10 and prior · Telecontrol Gateway VM: Versions 4.2.21 5.0.27 5.1.19 6.0.16 and prior; · +2 more

Full record on NVD

Fix

Update Psigridconnect smart telecontrol unit tcg firmware to 6.0.16 · 5.1.20
Mitigation from the vendor CISA ICSA-19-059-01 · 5 productsPSI recommends users of affected devices update their devices to a version where this vulnerability is patched.
Mitigation from the vendor CISA ICSA-19-059-01 · 5 productsTo obtain the update, contact PSI GridConnect via email at: support@psigridconnect.com. A fix for the vulnerability is available in the following software releases: 5.1.20; 6.0.17,IEC104 Security Proxy Version 2.2.11; The following software releases are no longer supported: 4.2.x, and 5.0.x
Mitigation from the vendor CISA ICSA-19-059-01 · 5 productsPSI recommends deactivating the webserver via CLI since the web interface is not essential to the configuration of the device.

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.18.8read 2026-10-23
NVDCVSS 2.06.5read 2026-10-23
CNAweakness (CWE)CWE-79read 2026-10-23
NVDweakness (CWE)CWE-79read 2026-10-23
FIRST EPSSEPSS score2.6 %2026-10-22

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published: 2019-03-05
Last Modified: 2026-06-17
NVD status: Modified

Frequently asked questions

What is CVE-2019-6528?

Is CVE-2019-6528 actively exploited?

Active exploitation of CVE-2019-6528 has not been confirmed. Its EPSS score was 2.6% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2019-6528?

CVE-2019-6528 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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